MEXICO CITY — Mexico’s president responded angrily Tuesday to President-elect Donald Trump’s pledge to impose a 25 percent tariff on its products if the country didn’t curb the flow of irregular migrants and fentanyl, warning that the penalties would only wind up causing inflation and unemployment in the United States.

President Claudia Sheinbaum suggested Mexico could respond to Donald Trump’s threatened tariffs with levies of its own, warning the economic consequences would be dire.